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BitmapCacheOption Enumeration
Visual Studio 2008
Specifies how a bitmap image takes advantage of memory caching.
Assembly: PresentationCore (in PresentationCore.dll)
| Member name | Description | |
|---|---|---|
| Default | Caches the entire image into memory. This is the default value. | |
| OnDemand | Creates a memory store for requested data only. The first request loads the image directly; subsequent requests are filled from the cache. | |
| OnLoad | Caches the entire image into memory at load time. All requests for image data are filled from the memory store. | |
| None | Do not create a memory store. All requests for the image are filled directly by the image file. |
The following code example demonstrates how to load a BitmapImage and specify the BitmapCacheOption.
' Define a BitmapImage. Dim myImage As New Image() Dim bi As New BitmapImage() ' Begin initialization. bi.BeginInit() ' Set properties. bi.CacheOption = BitmapCacheOption.OnDemand bi.CreateOptions = BitmapCreateOptions.DelayCreation bi.DecodePixelHeight = 125 bi.DecodePixelWidth = 125 bi.Rotation = Rotation.Rotate90 MessageBox.Show(bi.IsDownloading.ToString()) bi.UriSource = New Uri("smiley.png", UriKind.Relative) ' End initialization. bi.EndInit() myImage.Source = bi myImage.Stretch = Stretch.None myImage.Margin = New Thickness(5)
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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